松油烯诱导的深蓝光CsPbBr_(3)量子点常温慢速生长  

Terpinene-induced Slow Growth of Deep Blue CsPbBr_(3) Quantum Dots at Room Temperature

作　　者：伏特 刘汉强 卫津锴 谢杨杨 张楷亮[1] FU Te;LIU Hanqiang;WEI Jinkai;XIE Yangyang;ZHANG Kailiang(Tianjin Key Laboratory of Thin Film Electronics and Communication Devices,School of Integrated Circuit Science and Engineering,Tianjin University of Technology,Tianjin 300384,China)

机构地区：[1]天津理工大学集成电路科学与工程学院薄膜电子与通信器件天津市重点实验室,天津300384

出　　处：《发光学报》2024年第10期1598-1603,共6页Chinese Journal of Luminescence

基　　金：天津市自然科学基金(22JCQNJC00910);国家重点研发计划(2017YFB0405600);天津理工大学研究生科创实践项目(YJ2319)。

摘　　要：全无机卤化铅钙钛矿量子点在常温下制备即可获得优异的发光特性,但其超快的生长速率使之难以获得超小尺寸纳米晶体,从而难以在常温下通过尺寸效应来实现深蓝光发射。基于此,本工作发展了一种通过抑制生长速率,在常温下制备深蓝光CsPbBr_(3)量子点的方法。以配体辅助再沉淀工艺为基础,在前体制备中引入松油烯来减缓量子点生长时的Cs离子供给,从而抑制晶体生长速率,使深蓝光CsPbBr_(3)量子点的生长时间延长至3 h。该方法实现了常温下CsPbBr_(3)量子点光致发光发射峰从深蓝光(447 nm)向绿光(517 nm)的有效调控。并结合配体比例调控,对松油烯的生长速率降低作用机制进行了论证。本工作对于钙钛矿量子点的生长调控具有重要意义。All-inorganic lead halide perovskite quantum dots(QDs)can obtain excellent luminescence properties via room-temperature preparation.However,the naturally ultra-fast growth rate of perovskite nanocrystals make it difficult to achieve ultrasmall size and quantum size effect inducing deep blue light emission of perovskite QDs,especially at room temperature.Here,a suppressing growth rate method was developed to prepare the deep blue CsPbBr_(3)QDs at room temperature.Based on the ligand-assisted reprecipitation process,terpinene was introduced into the precursor preparation to slow down the supply of Cs ions in the growth of CsPbBr_(3)QDs after nucleation stage.As a result,the growth time of deep blue light CsPbBr_(3)QDs was extended to 3 hours.Furthermore,this method realized the effective control of the photoluminescence(PL)emission peak of CsPbBr_(3)QDs from deep blue light(447 nm)to green light(517 nm).In addition,combined with the regulation of terpinene proportion,the effect of reducing the growth rate of terpinene was further demonstrated.This work is of great significance for the growth regulation of perovskite nanocrystals.

关 键 词：钙钛矿量子点 深蓝光发射 生长速率 CsPbBr_(3) 常温制备 

分 类 号：O482.31[理学—固体物理]